Isembart II D'ALTDORF 
Isembart II was born about 0735 in Altdorf, Uri Canton, Switzerland. Isembart II's father was Engilbert II D'ALTDORF and his mother was Berthe D'ALEMANIE. He was an only child. He died in 0805.
They had a son named Welf I von.
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Children
Welf I von ALTDORF
Welf I von was born in 0778 in Altdorf, Uri Canton, Switzerland. He died in Bavaria.